I've been having this issue for months now, but I don't know the first version it cropped up on. I've been running Sid on multiple machines, and all of them have this issue.
I've not had to use mailing lists for anything before, much less for a Debian issue, so I'm unsure what to include or how to format this... time to guess, I suppose. This is info from just one of multiple machines affected, but they're all kept up-to-date, more or less.
"apt list cinnamon-* cinnamon | grep installed":
cinnamon-common/unstable,unstable,now 5.0.6-1 all [installed,automatic]
cinnamon-control-center-data/unstable,unstable,now 5.0.2-2 all [installed,automatic]
cinnamon-control-center-goa/unstable,now 5.0.2-2 amd64 [installed,automatic]
cinnamon-control-center/unstable,now 5.0.2-2 amd64 [installed,automatic]
cinnamon-core/unstable,unstable,now 5.0.1 all [installed,automatic]
cinnamon-desktop-data/unstable,unstable,now 5.0.0-2 all [installed,automatic]
cinnamon-desktop-environment/unstable,unstable,now 5.0.1 all [installed,automatic]
cinnamon-l10n/unstable,unstable,now 5.0.2-2 all [installed,automatic]
cinnamon-screensaver/unstable,now 5.0.7-1 amd64 [installed,automatic]
cinnamon-session-common/unstable,unstable,now 5.0.1-3 all [installed,automatic]
cinnamon-session/unstable,now 5.0.1-3 amd64 [installed,automatic]
cinnamon-settings-daemon/unstable,now 5.0.4-2 amd64 [installed,automatic]
cinnamon/unstable,now 5.0.6-1 amd64 [installed,automatic]
"uname -a":
Linux portable-suffering 5.15.0-2-amd64 #1 SMP Debian 5.15.5-1 (2021-11-26) x86_64 GNU/Linux